No typing for the sub-modules

[ChangmoSung]

Library version
v2.0.0-alpha.3

The /enums sub-module (and the rest) don't seem to ship with type declarations, so TypeScript complains when you try to import from them:

It seems that it was resolved in this commit d6d8ac7.

However, types were added for other submodules, but not enums.

Could you add types for enums as well?

[hbbrawer-twitch]

+1 to this, it would be great to be able to use the enums from this package.

[mikehuebner]

Really odd this isn't caught by a test or something similar. I'll open a PR for this shortly.

[mikehuebner]

#772